You've uploaded an image of "Exercise 2.1" from a textbook on matrices. The exercise involves operations such as reducing matrices to triangular form, finding inverses using the Gauss-Jordan method and elementary transformations, and determining the rank of various matrices.

Would you like help with a specific problem from this exercise, or would you prefer a general explanation of any of these topics?

Related Questions:

1. What are the steps to reduce a matrix to triangular form?
2. How does the Gauss-Jordan method work for finding the inverse of a matrix?
3. Can you explain elementary transformations and how they're used to find inverses?
4. What is the significance of the rank of a matrix in linear algebra?
5. How does reducing a matrix to normal form help in determining its rank?

Tip: When finding the inverse of a matrix using Gauss-Jordan, make sure the matrix is square and non-singular (i.e., its determinant is non-zero).